Scientists show toxin produced by blue-green algae results in Alzheimer's-like symptoms in monkeys.
The data, which covers 367 cities, showed average PM2.5 levels dropping by 10% in 2015 compared to 2014.
Increased plastic production and use coupled with low recycling is fast flooding the oceans.
Denmark is on track to hit its 2020 target of 50% electricity produced by wind turbines.
Volatile volcanoes in the Snowball Earth theory could be the cause of cap carbonates, solving the mystery.
South Africa is in the grips of a severe drought that shows no sign of abating after the driest year on record.
Most of the rhinos killed were black rhinos; considered critically endangered.
Bodies are buried in foetal position inside pods and then a tree is planted above.
'Near-record' warm water tied to 'remarkable' development, say meteorologists.
European whales, dolphins and porpoises contain among highest levels of toxic polychlorinated biphenyls on planet.
Earth shuddered and boomed as freezing water cracked frozen mud and rock, say meteorologists.
Greenhouse gas emissions are driving the planet towards a prolonged warming trend, German scientists warn.
Biologists believe that the warming of sea surface temperatures may have affected the fish that they feed on.
Footage shows Mitsubishi completely encased in ice after being parked by lake.
Ten vultures in Peru have been fitted with GPS devices and video cameras in a unique bid to locate garbage sites.
BREAKING: More than 25 fin whales have died as local authorities and marine experts rush to save others.
Warming and lower oxygen levels mean bad news for marine life, researchers say.
Dilley was criticised for going on holiday to Caribbean during the worst flooding crisis for years.
2015 Nepal earthquake did not reach the surface meaning another disaster looms in coming decades.
Latest finding fuels fears that natural gas extraction is rattling the Earth.
The UK can expect a sudden blast of cold weather in January after one of the mildest Decembers in history.
Thousands of pink bottles containing Vanish stain remover wash up after being lost at sea.
Five reasons scientists have suggested human activity has changed the Earth forever.
This video will change your perception of time since the beginning of our planet.
News that Yellowstone supervolcano could erupt within the next century are not accurate.
European Science Foundation warns governments are not prepared for danger posed by large volcanic eruptions
Scientists say the Earth's geological record has changed since the beginning of the Holocene epoch.
The last time the canal was drained, those in charge of the cleaning removed 40 tonnes of waste, including at least one car.
Several abandoned cars were seen almost entirely submerged at a flooded intersection.
Jerry Brown demands stepped up regulations, mitigation for shocking pollution